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ID

VAR-202603-1677


CVE

CVE-2026-4203


DESCRIPTION

A vulnerability was detected in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Impacted is the function cgi_portforwarding_add/cgi_portforwarding_del/cgi_portforwarding_modify/cgi_portforwarding_add_scan/cgi_dhcpd_lease/cgi_ddns/cgi_ip/cgi_dhcpd of the file /cgi-bin/network_mgr.cgi. The manipulation results in command injection. The attack may be launched remotely. The exploit is now public and may be used.

Trust: 1.0

sources: NVD: CVE-2026-4203

AFFECTED PRODUCTS

vendor:dlinkmodel:dns-327lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-1100-4scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-343scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-345scope:lteversion:2026-02-05

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vendor:dlinkmodel:dnr-326scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-1550-04scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-321scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-325scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-120scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-315lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-323scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-326scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-340lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-320lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-320lwscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-726-4scope:lteversion:2026-02-05

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vendor:dlinkmodel:dnr-202lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-322lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-1200-05scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-320scope:lteversion:2026-02-05

Trust: 1.0

sources: NVD: CVE-2026-4203

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com: CVE-2026-4203
value: LOW

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nvd@nist.gov: CVE-2026-4203
value: CRITICAL

Trust: 1.0

cna@vuldb.com: CVE-2026-4203
severity: MEDIUM
baseScore: 6.5
vectorString: AV:N/AC:L/AU:S/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: SINGLE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: 8.0
impactScore: 6.4
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.0

cna@vuldb.com: CVE-2026-4203
baseSeverity: MEDIUM
baseScore: 6.3
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: LOW
integrityImpact: LOW
availabilityImpact: LOW
exploitabilityScore: 2.8
impactScore: 3.4
version: 3.1

Trust: 1.0

nvd@nist.gov: CVE-2026-4203
baseSeverity: CRITICAL
baseScore: 9.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 3.9
impactScore: 5.9
version: 3.1

Trust: 1.0

sources: NVD: CVE-2026-4203 // NVD: CVE-2026-4203

PROBLEMTYPE DATA

problemtype:CWE-77

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problemtype:CWE-74

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sources: NVD: CVE-2026-4203

EXTERNAL IDS

db:VULDBid:351115

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db:NVDid:CVE-2026-4203

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sources: NVD: CVE-2026-4203

REFERENCES

url:https://vuldb.com/?ctiid.351115

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url:https://www.dlink.com/

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url:https://vuldb.com/?submit.770401

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url:https://github.com/wudipjq/my_vuln/blob/main/d-link8/vuln_122/122.md

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url:https://vuldb.com/?submit.770407

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url:https://github.com/wudipjq/my_vuln/blob/main/d-link8/vuln_123/123.md

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url:https://vuldb.com/?id.351115

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url:https://vuldb.com/?submit.770403

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url:https://vuldb.com/?submit.770408

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url:https://vuldb.com/?submit.770406

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url:https://vuldb.com/?submit.770405

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url:https://vuldb.com/?submit.770404

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url:https://vuldb.com/?submit.770402

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sources: NVD: CVE-2026-4203

SOURCES

db:NVDid:CVE-2026-4203

LAST UPDATE DATE

2026-03-19T23:25:02.312000+00:00


SOURCES UPDATE DATE

db:NVDid:CVE-2026-4203date:2026-03-19T14:23:12.530

SOURCES RELEASE DATE

db:NVDid:CVE-2026-4203date:2026-03-16T14:20:05.323